As a rule there is no other opening to the body except the mouth, but in some cases excretory pores are known to occur in the foot, and pores may occur at the tips of the tentacles.

Attempts to take an object already seized by a nautilus may tear away the creature's tentacles, which remain firmly attached to the surface of the object.

Detached tentacles and dead specimens ( including those that wash up on shore ) can sting just as painfully as the live creature in the water and may remain potent for hours or even days after the death of the creature or the detachment of the tentacle.

All of these fish benefit from the shelter from predators provided by the stinging tentacles, and for the Portuguese man o ' war the presence of these species may attract other fish to feed on.

The feature most commonly associated with the genus are the fleshy tentacles found on the head in adult males ; females may possess tentacles along the snout margin but they are smaller and they lack tentacles on the head.

Females prefer males that are already protecting eggs and may prefer males that are protecting larvae ; it has been suggested that the tentacles may act as a fry mimic to attract females, which would allow males without eggs in their nest to compete with males guarding eggs.

Subclass Dendrochirotacea has 8-30 oral tentacles, subclass Aspidochirotacea has 10-30 leaflike or shieldlike oral tentacles, while subclass Apodacea may have up to 25 simple or pinnate oral tentacles and is also characterized by reduced or absent tube feet, as in the order Apodida.

Removal of tentacles without prior application of vinegar may cause unfired nematocysts to come into contact with the skin and fire, resulting in a greater degree of envenomation.

In some species, this extends upwards to also enclose part of the polyps, in some cases including a closeable lid through which the polyp may extend its tentacles.

Sometimes these medusoid buds may be so degenerate as to entirely lack tentacles or mouths, essentially consisting of an isolated gonad.

Although morphology varies greatly within the family, the Chiroteuthidae are distinguished by their extremely elongate bodies and ( in most species ) tentacles ; the latter may be up to four times the mantle length in Asperoteuthis acanthoderma.

Their most distinctive features are their extremely elongate tentacles — which retract into membranous lateral sheaths of the fourth ( and largest ) arms — and their very large ovate fins, which may occupy up to 80 % of the mantle length in some species.

The tentacles of larger specimens may trail as long as or more.

Its " tentacles " may be comparable to those in the present-day hagfish, a jawless chordate.

Pikaia had a pair of large head tentacles and a series of short appendages, which may be linked to gill slits, on either side of its head.

Additionally, hooklets from cephalopod tentacles and what may be fish scales have been found near the belly regions of some specimens.

The so-called " aria della piovra " (" Octopus aria "), " Un dì, ero piccina ", where Iris describes a screen she had seen in a Buddhist temple when she was a child, depicting an octopus coiling with its tentacles around a young woman, may have been inspired by the print " The Dream of the Fisherman's Wife " ( 1814 ) by the Japanese artist Hokusai.

Some globsters lack bones or other recognisable structures, while others may have bones, tentacles, flippers, eyes or other features that can help narrow down the possible species.

Corals divide into two subclasses, depending on the number of tentacles or lines of symmetry, and a series of orders corresponding to their exoskeleton: nematocyst type and mitochondrial genetic analysis.

The English name Octopus card was also selected from the naming competition, and coincides with the number eight in the Cantonese name, since an octopus has eight tentacles.

These have a more or less cylindrical body with a terminal mouth on a raised protuberance called the hypostome, surrounded by a number of tentacles.

Most hydrozoan medusae have just four tentacles, although a number of exceptions exist.

The major dividings of Coleoidea are based upon the number of arms or tentacles and their structure.

A number of minute tentacles around the foot, called captacula, sift through the sediment and latch onto bits of food, which they then convey to the mouth.

The collar bears a number of large arms, each of which includes a row tentacles along one side.

Up to eighty tentacles line the bell margin, with about an equal number of statocysts.

This term refers exclusively to the non-polyp life-stage which occurs in many cnidarians, which is typified by a large pulsating gelatinous bell with long trailing tentacles.

However, in common with many mutualisms, there is more than one aspect to it: in the anemonefish-anemone mutualism, waste ammonia from the fish feed the symbiotic algae that are found in the anemone's tentacles.

Although many sea cucumbers have branched tentacles surrounding the oral opening, these have originated from modified tube feet and are not homologous to the arms of the crinoids, sea stars, and brittle stars.

The tentacles are extremely sensitive and will bend toward the center of the leaf to bring the insect into contact with as many stalked glands as possible.

However, a pair of antero-lateral tentacles is present in 2 of the many genera of pelagic nemerteans.

The many small, sharp, recurved teeth of the frilled shark are functionally similar to squid jigs and could easily snag the body or tentacles of a squid, particularly as they are rotated outwards when the jaws are protruded.

The phylum Mollusca includes many species with muscular hydrostats in the form of tentacles and arms.

A few large species have many eyes in clusters over the brain, mounted on tentacles, or spaced uniformly round the edge of the body.

This new brand of evolved Kree, called Ruul, have a grayish skin tone and many shoulder-length tentacles atop their heads.

As many as 90 tentacles are arranged in two circles around the mouth.

In addition to capturing prey with their tentacles, many stony corals also produce mucus films that they can move over their bodies using cilia ; these trap small organic particles and are then pulled into the mouth.

Gravemind resembles a large Venus Flytrap with many tentacles, but is capable of movement and linguistic communication via its large mouth formed from overlapping fleshy ' leaves '.

This is found in many mammalian and lizard tongues along with squid tentacles.

A feyr resembles a large human brain with a partial layer of skin stretched over it, with many tentacles for walking and grabbing at unwary travellers.

I could ... make out many more details ... Those huge lidless eyes which stared in hate at me, the jointed tendrils which seemed to twist from the head in cosmic rhythms, the ten legs, covered with black shining tentacles and folded into the pallid underbody, and the semi-circular ridged wings covered with triangular scales ...